Programs of Python Based on Class and Objects

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Programs of Python Based on Class and Objects

1.Program to Append, Delete and Display Elements of a List Using Classes?

Program:-

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Code:-

class check():

    def __init__(self):

        self.n=[]

    def add(self,a):

        return self.n.append(a)

    def remove(self,b):

        self.n.remove(b)

    def dis(self):

        return (self.n)

obj=check()

choice=1

while choice!=0:

    print("0. Exit")

    print("1. Add")

    print("2. Delete")

    print("3. Display")

    choice=int(input("Enter choice: "))

    if choice==1:

        n=int(input("Enter number to append: "))

        obj.add(n)

        print("List: ",obj.dis())

    elif choice==2:

        n=int(input("Enter number to remove: "))

        obj.remove(n)

        print("List: ",obj.dis())

    elif choice==3:

        print("List: ",obj.dis())

    elif choice==0:

        print("Exiting!")

    else:

        print("Invalid choice!!")

print()

Output:-

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0. Exit

1. Add

2. Delete

3. Display

Enter choice: 1

Enter number to append: 34

List:  [34]

0. Exit

1. Add

2. Delete

3. Display

Enter choice: 1

Enter number to append: 54

List:  [34, 54]

0. Exit

1. Add

2. Delete

3. Display

Enter choice: 1

Enter number to append: 89

List:  [34, 54, 89]

0. Exit

1. Add

2. Delete

3. Display

Enter choice: 3

List:  [34, 54, 89]

0. Exit

1. Add

2. Delete

3. Display

Enter choice: 0

Exiting!

2.Program to find area of rectangle?

Program:-

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Code:-

class rectangle():

    def __init__(self,breadth,length):

        self.breadth=breadth

        self.length=length

    def area(self):

        return self.breadth*self.length

a=int(input("Enter length of rectangle: "))

b=int(input("Enter breadth of rectangle: "))

obj=rectangle(a,b)

print("Area of rectangle:",obj.area())

print()

Output:-

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Enter length of rectangle: 43

Enter breadth of rectangle: 5

Area of rectangle: 215

3.Program to find area and perimeter of circle?

Program:-

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Code:-

import math

class circle():

    def __init__(self,radius):

        self.radius=radius

    def area(self):

        return math.pi*(self.radius**2)

    def perimeter(self):

        return 2*math.pi*self.radius

r=int(input("Enter radius of circle: "))

obj=circle(r)

print("Area of circle:",round(obj.area(),2))

print("Perimeter of circle:",round(obj.perimeter(),2))

Output:-

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Enter radius of circle: 10

Area of circle: 314.16

Perimeter of circle: 62.83

4.Program to Create a Class which Performs Basic Calculator Operations?

Program:-

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Code:-

class cal():

    def __init__(self,a,b):

        self.a=a

        self.b=b

    def add(self):

        return self.a+self.b

    def mul(self):

        return self.a*self.b

    def div(self):

        return self.a/self.b

    def sub(self):

        return self.a-self.b

a=int(input("Enter first number: "))

b=int(input("Enter second number: "))

obj=cal(a,b)

choice=1

while choice!=0:

    print("0. Exit")

    print("1. Add")

    print("2. Subtraction")

    print("3. Multiplication")

    print("4. Division")

    choice=int(input("Enter choice: "))

    if choice==1:

        print("Result: ",obj.add())

    elif choice==2:

        print("Result: ",obj.sub())

    elif choice==3:

        print("Result: ",obj.mul())

    elif choice==4:

        print("Result: ",round(obj.div(),2))

    elif choice==0:

        print("Exiting!")

    else:

        print("Invalid choice!!")

 print()

Output:-

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Enter first number: 40

Enter second number: 30

0. Exit

1. Add

2. Subtraction

3. Multiplication

4. Division

Enter choice: 1

Result:  70

0. Exit

1. Add

2. Subtraction

3. Multiplication

4. Division

Enter choice: 2

Result:  10

0. Exit

1. Add

2. Subtraction

3. Multiplication

4. Division

Enter choice: 0

Exiting!

5 Program to Create a Class and Get All Possible Subsets from a Set of Distinct Integers?

Program:-

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Code:-

class sub: 

    def f1(self, s1): 

        return self.f2([], sorted(s1)) 

    def f2(self, curr, s1): 

        if s1: 

            return self.f2(curr, s1[1:]) + self.f2(curr + [s1[0]], s1[1:]) 

        return [curr] 

a=[]

n=int(input("Enter number of elements of list: "))

for i in range(0,n):

    b=int(input("Enter element: "))

    a.append(b)

print("Subsets: ")

print(sub().f1(a))

Output:-

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Enter number of elements of list: 5

Enter element: 1

Enter element: 2

Enter element: 3

Enter element: 4

Enter element: 5

Subsets:

[[], [5], [4], [4, 5], [3], [3, 5], [3, 4], [3, 4, 5], [2], [2, 5], [2, 4], [2, 4, 5], [2, 3], [2, 3, 5], [2, 3, 4], [2, 3, 4, 5], [1], [1, 5], [1, 4], [1, 4, 5], [1, 3], [1, 3, 5], [1, 3, 4], [1, 3, 4, 5], [1, 2], [1, 2, 5], [1, 2, 4], [1, 2, 4, 5], [1, 2, 3], [1, 2, 3, 5], [1, 2, 3, 4], [1, 2, 3, 4, 5]]

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